The deleted scenes were indeed terrible, and - as 98% of deleted scenes in 98% of films - they were removed for good reasons (particularly that imbecilic day opening)... but that was not a valid reason to make them unavailable for viewing at all. The vast majority of deleted scenes are worthless and epitomize drivel - yet even truly bad ones are often included in DVD releases, usually with the approval of directors, who often treat this as one might treat the "freak curtain" section of a 19th century cabinet of curiosities...
I understand that Walter Hill may feel ashamed of those scenes and does not want them to be viewed even as a curiosity. I would not be surprised if some of them had not even been shot by him (that awful day opening has the distinctive stench of "studio addition") - that would make his objection against their inclusion perfectly justified. However, considering that deleted scenes that do make it to existing DVDs as extra features very rarely represent all material that was cut from the film, and taking into account the typical running time of most rough cuts and workprints from late 70s, I would suspect that there was well over half an hour of alternate or additional footage shot - and that would be enough to choose some interesting snippets for the disc.
And, Mister Hill... however bad even the worst deleted scene was, it would be practically impossible for it to be worse than the comic book insertions in the Ultimately Disgraceful Cut.